Wall-pipe for furnaces.



C JOHN N.

WALL PIPE FOR FURNACES.

APPLICATION FILED OCT-13. I914.

Patented Dec. 14, 1915.

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w 11mm.

CHARLES JOHNSON, OF PEORIA, ILLINOIS.

WALL-PIPE FOR FURNACES.

Specification of Letters Patent.

Patented Dec. 14L, 191.5.

Application filed October 13, 1914. Serial No. 866,531.

To all whom it may concern:

Be it known that I, CHARLns JOHNSON, a citizen of the United States,residing at Peoria, in the county of Peoria and State of Illinois, haveinvented. certain new and useful Improvements in i/Vall-Pipes forFurnaces; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to wall pipes for furnaces, and one of theprincipal objects of the invention is to provide a rectangular wall pipesection comprising two members, an inner member and an outer memberconnected together and provided with braces and openings which will givea free circulation between the inner and outer walls and said sectionseach being provided with a reduced end and a larger end to fit the nextadjacent section, said pipe sections each being formed of two piecesproperly seamed and connected together.

The foregoing and other objects may be attained. by means of theconstruction illustrated in the accompanying drawing, in which,

Figure 1 is av perspective view of one of the pipe sections, Fig. 2 is alongitudinal sectional view of the same, Fig. 8 is a vertical sectiontaken through two sections con nected together. Fig. 1 is a detailsectional view showing the method of double seaming the ends of theinner and outer walls together.

Referring to the drawing, the numeral 1 designates the inner member and2 is the outer member of the section, said members being preferablyformed of tin or other sheet metal of the required thickness, and saidouter member being provided with openings 3 formedin the inclinedportion 41, and said openings being formed by cutting tongues or braces5 out of the material and bending said braces inwardly to bear againstthe inner'member 1 of the pipe sections. The inner section 1 at itsupper end is bent over the outer section to form an inclosing flange 6adapted to hold the two members together firmly. The inner memher 1 isprovided with an inclined portion 7, having openings 8 therein andtongues cut from the inclined portion 7, said tongues 9 forming bracesagainst the outer member of the wall 2. The outer member 2 is flangedover the lower edge of the member 1 as shown at 10.

From the foregoing it will be obvious that one section will fit smoothlyover the other and not leave a projection. either on the inner or outerside of the pipe, and that there is a good clear space between the innerand outer members of each section, and that they are braced by thetongues 5 to give stability to the pipe section.

Various changes may be made in the details of construction withoutdeparting from the spirit and scope of the invention as defined in theclaim.

What is claimed is A wall pipe for furnaces comprising a plurality ofsections, each section comprising an inner and outer wall, said outerwall being inclined inwardly at its upper edge toward the inner wall,said inner wall being inclined outwardly toward the outer wall, wherebysaid sections are fitted one to the other, the walls of said sectionsbeing oppositely flanged to secure them together, said outer wall havingtongues cut out from the inclined portion below the flange, the innerwall having similar tongues cut out from the inclined portion above theflange, said tongues being bent inwardly, whereby said walls are held inspaced relation, the

apertures thus formed being adapted to register with similarly formedapertures in the other section when said sections are fitted together,whereby air can circulate through the sections, and the tongues servingto spread the air.

In testimony whereof I afliX my signature in presence of two witnesses.

CHARLES JOHNSON. Witnesses H. F. BLAKE, CARL WVARREN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, I). G.

